Microsoft has resolved an Always On VPN bug that caused connection failures after the September 2026 Windows 11 security update, confirming the fix is included in this month's KB5127936 preview update. The company had earlier mistakenly claimed the issue was resolved in October's cumulative update. Affected users saw VPN connections stuck in a 'Connecting' state or fail with a 'port already in use' error when automatic protocol selection or fallback was configured.
bleepingcomputer.com
· 2026-10-30
Microsoft told IT admins it wrongly marked an Always On VPN connection bug as resolved in October 2026 Windows 11 cumulative updates, reverting the status to 'Mitigated.' The bug, first acknowledged in September, can leave VPN connections stuck or failing with a 'port already in use' error on Windows 11 24H2 systems using automatic protocol selection.
it.slashdot.org
· 2026-10-22
Microsoft has told IT administrators that the September 2026 security updates for Windows 11 versions 26H1, 25H2 and 24H2 can cause Always On VPN connections to fail when automatic protocol selection between IKEv2 and SSTP is enabled. Affected connections may get stuck in a 'Connecting' state or throw a 'port already in use' error on retry. Microsoft has not yet issued a permanent fix but recommends administrators manually set the VPN profile to use only SSTP or only IKEv2 as a workaround.
bleepingcomputer.com
· 2026-09-23
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